[Win] Draw the circular avatar programmatically rather than with a frame.

ui/gfx/canvas.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_CANVAS_H_
 #define UI_GFX_CANVAS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 183 matching lines @@
   void SaveLayerAlpha(uint8 alpha);
   void SaveLayerAlpha(uint8 alpha, const Rect& layer_bounds);
 
   // Restores the drawing state after a call to Save*(). It is an error to
   // call Restore() more times than Save*().
   void Restore();
 
   // Adds |rect| to the current clip.
   void ClipRect(const Rect& rect);
 
-  // Adds |path| to the current clip.
-  void ClipPath(const SkPath& path);
+  // Adds |path| to the current clip. |do_anti_alias| is true if the clip
+  // should be antialiased.
+  void ClipPath(const SkPath& path, bool do_anti_alias);
 
   // Returns true if the current clip is empty.
   bool IsClipEmpty() const;
 
   // Returns the bounds of the current clip (in local coordinates) in the
   // |bounds| parameter, and returns true if it is non empty.
   bool GetClipBounds(Rect* bounds);
 
   void Translate(const Vector2d& offset);
 
@@ skipping 251 matching lines @@
 
   skia::RefPtr<skia::PlatformCanvas> owned_canvas_;
   SkCanvas* canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(Canvas);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CANVAS_H_